(a)- Time
(b)- Heat produced(i guess)
(c)- Material
this is what I think, hope it helps
Gold is an element. Water is made from hydrogen and oxygen, and silicon dioxide is an oxide of silicon, consisting of <span> two oxygen atoms and one silicon</span>
Answer: Option (B) is the correct answer.
Explanation:
Marble is also known as calcium carbonate and its chemical formula is
.
When it combines with vinegar then it results in the formation of calcium acetate which is a water soluble compound along with the release of carbon dioxide which occurs in the form of bubbles and water.
The reaction is as follows.

Whereas vinegar being a weak acid will not react with glass, copper and steel.
Answer:
I think the answer is A.
please give thanks if it helps
and sorry if it doesn't help.