What is the missing statement in step 3 of the proof?

(B)      

Step-by-step explanation:

Given: ∠1 is complementary to ∠2 and ∠2 is complementary to ∠3.

To find: ∠1=∠3

Solution:

Statements                                                              Reason

1.∠1 is complementary to ∠2                                    Given

2.∠2 is complementary to ∠3                                   Given

3.∠1+∠2=90°                                              Definition of complementary angles

4.∠1=90°-∠2                                               Subtraction equality property

5.∠2+∠3=90°                                             Definition of complementary angles

6.∠3=90-∠2                                               Subtraction equality property

7.∠1=∠3                                                      Transitivity property

Thus, option B is correct.

but there’s no any figure there!