Answer the following question given this paragraph: 

85 million sperm per day are produced. per testicle. That's 170,000,000 every day. This means that a single male may produce more than a quadrillion (1,000,000,000,000) sperm cells in his lifetime! But it only takes one to fertilize an egg.


Q: How many sperm does it take to fertilize an egg?

 Choices:

- ten

- five

- two

- one

A:
one
