It’s letter D because the square in Step 1 is still not big enough to look like Step 2. hope this helps.
Answer:
B =

Step-by-step explanation:
In this type of questions the answers are required in the

form.
First of all, the equations in question must be arranged properly

Then you divide.

Answer

The units change by 88 to 87 so the unit decrease by 1 I think