Read the following context and choose the best option to answer the question.
Context: I remember once in fourth grade my teacher , Mrs. Armstrong , asked a question . I raised my and , was called on , and gave the word she was looking for . She waited a minute and then declared I was too soft ; repeat it , louder . I sighed a little and repeated .
Question: What may be the reason for their teacher asking them to speak up ?
Options: 
- They wanted to embarrass the student in the class .
 - They wanted the student to yell the answer .
 - The rest of the class could n't hear them speak .
 - None of the above choices .


The rest of the class could n't hear them speak .