Answer:
B. A pronoun that could refer to more than one person,place or thing.
Explanation:
When a sentence does not clearly identify which noun a subsequent pronoun refers to, the error is referred to as an unclear antecedent.
The dog littered, which means she had puppies. A group of puppies is called a litter. Littering normally means putting garbage down in a public outside area, or making a mess in a nature-related facility.
Most crashes are caused by distracted driving, more specifically using phones.