Identify the sentence written in the passive voice

Question

I used appropriate transitional devices.

The students achieved a higher success rate compared to last year.

Compared to last year, a higher success rate was achieved by the students.

I based the conclusion on facts.

Answer 1

The conclusion was based on facts.

Answer 2

The passive voice can be used for

To keep to the sentence structure, the same

sentence variety as an alternative to the active voice

focusing on the relationship between the verb and object

focusing on the sentence subject

Answer 3

focusing on the relationship between the verb and object.