Answer:
The correct option is A, 27%; 21%
Step-by-step explanation:
The return on investment based on book values=book value of income/book value of assets.
Wheels' return on investment:
Wheels' income based on book value is $130,000
Wheel's assets based on book value is $485,000
Wheel's return on investment=$130,000/$485,000=27%
Assembly's return on investment:
Assembly's income based on book value is $170,000
Assembly's assets based on book value is $800,000
Wheel's return on investment=$170,000/$800,000=21%
Hence the correct option is the first one