Question

m angle ABE = m angle CBD.....................................…
m angle ABE = m angle ABD + m angle DBE.................................B
m angle ABD + m angle DBE = m angle CBE + m angle DBE..........C
m angle ABD = m angle CBE.....................................… D

Questions:
what is A?
what is B?
what is C?
what is D?

Choices:
Distributive property
Substitution property
Addition property of equality
Division property of equality
HELP PLEASE