Which is the best reason for why companies use product advertising features? a)to focus on a specific benefit b)to advertise the entire line of products c)to cross-promote another product d)to barter with bulk retail stores

The correct answer would be A, to focus on a specific benefit.

Explanation:

When companies make products, they need to advertise them. They want people to know about the features and the benefits of the products they are launching. They use the Advertisement media to let the people know about their product. Their advertisement may include the product features. This is because companies want the public to know about certain benefits of using their products. They try to focus on the features, they try to advertise the specifications of the products to give a better understanding of the benefits or the specific benefit of the products.

an important city to the south and the region's capital is c. kiev

i might look it up later.