Questão PET - In activity 1c, different modal verbs were used to express the idea of possibility

In activity 1c, different modal verbs were used to express the idea of possibility. However, notice that they convey slightly different meanings in context. Complete the explanation in the box below using suggestion, distinct possibility and speculation.

While the verb could refers to a  A ,______________ the verb might indicates a  B , ______________  and the verb can sounds almost like a  C______________  .

RESPOSTA: 

A-distinct possibility; 

B-speculation; 

C-suggestion.