Answer:
The answer is probably have to be 9 because it squared.
Answer:group A
Expination its quite obvious because in the first every thing became steam powered and then but then in the second one electricity and petroleum became main power sources as they were more effeciant
True , if I’m right please give me brainliest .
Answer:
BOTH
Explanation:
thx for the free points lol.
Loyalist!
Hope this helps!:)
