Read the following context and choose the best option to answer the question.
Context: When they acted as if she had n't been burnt to ashes in the bowls of the rocket . These people had been her friends . If not her friends , at least her coworkers , people she had seen every day and had been on friendly terms with . Shera tried to get along with everyone .
Question: What may be the reason why they ignored what happened ?
Options: 
- They know she did n't really burn .
 - They are covering up their feelings .
 - They did n't like her .
 - They have n't let it sink in yet .


They are covering up their feelings .