Answer:
B, 140°.
Step-by-step explanation:
Firstly, you are using the protractor incorrectly. One line of the angle must be at 0°.
Judging from what you have done, one line is pointing to 15° and the other to 155°. As 15° should be at 0, you take away 15° from both to give you zero and 140°, so your answer is 140°.
