Ineed asap i will you brainlist hurry

which statement about the sum of two additive inverses is true? select all that apply.

a.
the sum is 1.

b.
the sum is zero.

c.
the sum must be a positive number.

d.
the sum must be a negative number.

e.
the addends are the same number with opposite signs.

f.
the addends are the same number with the same signs.