Answer:
b. 0.76 years
Explanation:
Mercury is the closest planet to the Sun and the Earth is the third planet from the Sun.
The orbital period of the Earth is 1 year.
Orbital period of the Mercury is 88 days = 0.24 years (Earth years)
Thus, the difference between the orbital periods of Mercury and Earth is
1 year - 0.24 years = 0.76 years
Thus, the correct option is b.