A can paint a painting in 12 days. B can paint the same in 8 days. C can paint the same in 10 days. Find the (approximate) number of days in which the painting can be painted by A if he is accompanied by both B and C together on alternate days and A starts painting on the first day alone.

A

4.4 days

B

5.4 days

C

7.2 days

D

8.5 days