When the campaign was over, word about it kept spreading. As a result, orders poured in. Reporters wrote about Sterling's unique invention. This led to even more orders. Because of all the attention, stores began to contact Sterling.

–"Standing Out in the Crowd"

According to the passage, what was the effect of "all the attention” Sterling got?

The campaign ended.
Reporters wrote about Sterling’s invention.
Stores began to contact Sterling.
Sterling could not fill all the orders.