Final answer:
Technician A is wrong about rotary engines while Technician B is correct that in-line engines are generally easier to work on than V engines. Option b is correct.
Step-by-step explanation:
Technician A is incorrect because a rotary engine, also known as a Wankel engine, does not have cylinders arranged side by side, but instead has a triangular rotor that rotates inside an epitrochoidal chamber. Technician B is correct as in-line engines are typically easier to work on than V engines due to their simpler design and more accessible layout of engine components. Therefore, the correct answer is b. Technician B.