The first tennis balls were made of what material?

Explanation:

Leather stuffed with human or horse hair and wool.

The first tennis balls were made of rubber

Explanation:

In the 18th century, strips of wool were tightly wound round a nucleus made of cork. Tennis balls with a cork core and cloth covering are still used in the original game of tennis, known as Real Tennis. In 1870, vulcanized rubber was first used to manufacture tennis balls.

b and c would be the answers

answer a scar develops;