hi!
i think the answer to this would be B. 5.
explanation:
in this expression, if you were to factor it using the distributive property, you would apply 5 to the numbers in the parentheses by multiplication.
also, for answers like A and C, they are more than a factor. for example: C. 35x is both a factor and a variable; 35 is the factor and x is the variable, and together they are concerned a term.
this should be correct. i hope this helps:)