Which sentence contains an error in grammar?

Question

A.
When I am feeling angry, I count to ten, but sometimes I am still angry.

B.
Because Tomás wanted to ride his bike, when he met his classmates downtown.

C.
Since you are the fastest runner, I think you should enter the race.

D.
Emma needed a new notebook, so she left the meeting early

Answer 1

The sentence that contains an error in grammar is:

B. Because Tomás wanted to ride his bike, when he met his classmates downtown.

This sentence is a fragment because it begins with "Because" and is improperly connected to the second part. It should be revised to form a complete thought, such as: "Tomás wanted to ride his bike when he met his classmates downtown."