Switch Between Images

Hello i have been working on making a quiz game in unity that consists of True or False , at the moment i am using text to display whether the answer is wrong or correct, but i would like to use images instead, but i have no idea how to go about it . Any help is Appreciated . Here is my game manger code . Thanks in advance.

using UnityEngine; using System.Collections; using UnityEngine.UI; using System.Collections.Generic; using System.Linq; using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour {

 public Question[] questions;
 private static List<Question> unansweredQuestions;
 
 private Question currentQuestion;
 
 [SerializeField]
 private Text factText;
 
 [SerializeField]
 private Text trueAnswerText;
 [SerializeField]
 private Text falseAnswerText;
 
 [SerializeField]
  private Animator animator;
 
 [SerializeField]
 private float TimeBetweenQuestions = 1f;
 
 void Start()
 {
     if (unansweredQuestions == null || unansweredQuestions.Count == 0)
     {
         unansweredQuestions = questions.ToList<Question>();
     }
 
     SetCurrentQuestion();
 }
 
 void SetCurrentQuestion ()
 {
     int randomQuestionIndex = Random.Range(0, unansweredQuestions.Count);
     currentQuestion = unansweredQuestions[randomQuestionIndex];
 
     factText.text = currentQuestion.fact;
 
     if (currentQuestion.isTrue)
     {
         trueAnswerText.text = "Like A Boss!";
         falseAnswerText.text = "False";
     }else
     {
         trueAnswerText.text = "WRONG";
         falseAnswerText.text = "Like A Boss!";
     }
 }
 
 IEnumerator TransitionToNextQuestion ()
 {
     unansweredQuestions.Remove(currentQuestion);
 
     yield return new WaitForSeconds(TimeBetweenQuestions);
 
     SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
 }
 
 public void UserSelectTrue ()
 {
     animator.SetTrigger("True");
     if (currentQuestion.isTrue)
     {
         Debug.Log("LIKE A BOSS!");
     } else
     {
         Debug.Log("WRONG!");
     }
 
     StartCoroutine(TransitionToNextQuestion());
 }
 
 public void UserSelectFalse()
 {
     animator.SetTrigger("False");
     if (!currentQuestion.isTrue)
     {
         Debug.Log("LIKE A BOSS!");
     }
     else
     {
         Debug.Log("WRONG!");
     }
 
     StartCoroutine(TransitionToNextQuestion());
 }
 

}