Answer:
D it manufactured shell casings and tank parts.
Explanation:
"J.B. Beaird Company manufactured shell casings, anchors, and tank parts."
Thank you for the points bro lol answer is 5
It protects peoples ideas
He was an industrialist and philanthropist. He got his fortune in the steel industry by creating the Carnegie Steel Company and he revolutionized the way steel is produced in the U.S.