A bird flew into Annie's house while opening the window. Choose the answer that is the most effective substitute for the underlined part of the sentence. If no substitute is necessary,

choose 'Leave as is.'

A)Leave as is.

B)Opening the window, a bird flew into Annie's house.

C)While opening the window, a bird flew into Annie's house.

D)While Annie was opening the window, a bird flew into her house.

D)While Annie was opening the window, a bird flew into her house.

Explanation:

This is the best substitute for the sentence given above. This is because, the sentence was trying to describe what happened when Annie was opening the window of her house. A bird which she never expected to be there flew into her house.

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.