Choose the progressive perfect form of the verb! Antonio along the river when someone began to pelt him with oranges.

Choose 1

(Choice A)
A
was walking

(Choice B)
B
had been walking

(Choice C)
C
had walked

Please don't give me a wrong answer. I'm trying so hard to get every one of these right

Which statement contains an opinion? the ants serve to protect the acacia from other plants and herbivores. the acacia depends on pollinators for the exchange of genetic material. the acacia has no chemical defenses to discourage herbivores. the ants provide the acacia with the best protection from other plants and herbivores.