Brainliest 100pts

Part A:
In this lab we first mixed some liver with hydrogen peroxide in test tube #1 and observed foaming letting it completely react. Then we poured off the remaining liquid into a second test tube #2. Next we added fresh liver to test tube #2 and no reaction (foaming) occurred because;

A)The liquid in test tube #2 was Oxygen.
B)The liquid in test tube #2 was water.
C)The liquid in test tube #2 was Hydrogen peroxide.
D)The liquid in test tube #2 was Catalase.

Part B:
After pouring out the liquid from test tube#1 as described above, we then added fresh hydrogen peroxide back into test tube #1 with the original piece of liver still in it, and it began to foam again. The new foaming is evidence of which of the following claims?

Question 7 options:

After pouring out the liquid from test tube#1 as described above, we then added fresh hydrogen peroxide back into test tube #1 with the original piece of liver still in it, and it began to foam again. The new foaming is evidence of which of the following claims?

Question 7 options:

After pouring out the liquid from test tube#1 as described above, we then added fresh hydrogen peroxide back into test tube #1 with the original piece of liver still in it, and it began to foam again. The new foaming is evidence of which of the following claims?

A)The first chemical reaction produced more Catalase, and so when more hydrogen peroxide was introduced, the foaming began again.
B)The Catalase was still present in the liver tissue because the enzyme was not used up as a reactant in the chemical reaction.
C)After the liquid water was poured out earlier, the new hydrogen peroxide reacted with the oxygen in the air to start the foaming process again.
D)The Catalase was poured out of the test tube earlier leaving the hydrogen peroxide found in liver tissue to react again with oxygen.