Sentences using active voice $\_\_\_\_\_.$

Question $3$ options:

a$)$

include a clear agent performing the action

b$)$

might be too blunt to be effective

c$)$

might be inappropriate if the object is more important than the subject

d$)$

have the recipient of the action in the subject slot of the sentence

e$)$

only $\text{'}$a$,\text{'}\text{'}$b$,\text{'}$ and $\text{'}$c$\text{'}$ are correct