The multiplicative identity for integers is
$
  {\text{A}}{\text{. 0}} \\
  {\text{B}}{\text{. 1}} \\
  {\text{C}}{\text{. 0}}{\text{.1}} \\
  {\text{D}}{\text{. 2}} \\
$

Hint: To solve this question first you have to understand what is multiplicative identity and then take any integer for example 2 and check which option satisfies multiplicative identity of integers.

Complete step-by-step answer:

Multiplicative identity:
The multiplicative identity property states that any time you multiply an integer by 1, the result, or product, is that original number.

To write out this property using variables, we can say that n×1=n. It doesn't matter if n equals one, one million or 3.566879. The property always holds true.

Let us take an integer n=2 then,

2×1=1×2=2

Hence, the multiplicative identity for integers is 1

Hence option B is the correct option.

Note: Whenever we get this type of question the key concept of solving is first understanding all the terms either used or asked in the question. Best way of solving is written in hints as take an integer as an example and check for all options which is satisfying multiplicative identity of integers.