Use the u Tag to

Tell us what’s happening:
Here I also got the same message so what is my problem?

Your code so far


<style>
  h4 {
    text-align: center;
    height: 25px;
  }
  p {
    text-align: justify;
  }
  .links {
    text-align: left;
    color: black;
  }
  .fullCard {
    width: 245px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin: 10px 5px;
    padding: 4px;
  }
  .cardContent {
    padding: 10px;
  }
  .cardText {
    margin-bottom: 30px;
  }
</style>
<div class="fullCard">
  <div class="cardContent">
    <div class="cardText">
      <h4>Google</h4>
      <p>Google was founded by Larry Page and Sergey Brin while they were
         <u>Ph.D.students</u> at <strong>Stanford University</strong>.</p>
    </div>
    <div class="cardLinks">
      <a href="....</a><br><br>
      <a .....</a>
    </div>
  </div>
</div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36.

Link to the challenge:

These tests often check for exact spelling. Here there should be a space between Ph.D. and students