The first one is B
The second one is D
Hope this helps you!
The product of the expression
is the expression 
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more variables and numbers.
Given the expression:

The product of the expression
is the expression 
Find out more on equation at: brainly.com/question/2972832
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The answer for this question is B because - -e/-f is the same as - -e/f
2/4 --> Once simplified by dividing each fraction part by 2 can get 1/2
4/8 --> Once simplified by dividing each fraction part by 4 can get to 1/2
2/5 --> Cannot be simplified by any numbers
7/14 --> Once simplified by dividing each fraction part by 7 can get to 1/2
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2/5 is not equal to 1/2 <span>✔</span>