Answer:
A.
Step-by-step explanation:
a) Technician A
Technician A is correct. A white, milky appearance of the engine oil typically indicates that engine coolant (antifreeze) has mixed with the oil. This can occur due to a leaking head gasket, a cracked engine block, or other cooling system issues that allow coolant to enter the oil passages. It is a serious problem that should be addressed promptly because it can lead to engine damage if not resolved.
Technician B's statement that a milky appearance of the engine oil indicates transmission fluid leaking into the engine is not accurate. Transmission fluid and engine oil are separate systems in a vehicle, and their mixing would not result in a milky appearance of the engine oil.