Given the task definition and input, reply with output. You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: As the nail grows, more cells are added at the nail bed.
 Question: If a nail bed's cells are _____ , the nail is shrinking. 
 Choices: A)decreasing 
B)increasing
decreasing