A recent study compared the ingredients of sports drinks. The study found that all sports drinks contain similar ingredients. Water is the main component of all sports drinks. The drinks also contain salt, sugar, and flavorings. The water and salt replace fluids that are lost when athletes
sweat. The sugar provides added energy, and the flavorings are added to make sports drinks taste more appealing.
This study is good news for thrifty athletes who want to save money on sports drinks. With water, salt, sugar, and fruit juice, they can make
homemade sports drinks for a fraction of the price of the drinks available in stores.

CHOOSE ONE ANSWER PLEASE:

What characteristic of the passage makes it a secondary source?

1.It discusses current scientific research.

2. It is written about an important topic for athletes.

3. It is written in a manner that is easy for readers to understand.

4. It describes research conducted by someone other than the author.​