Refer to figures.
We can solve this question by using the semi-circular rule, and comparing appropriate VFR East-bound cruise levels with obstacle clearance capability along the route.

Firstly, VFR flights should use cruising altitudes that end with 500 ft - for example:
3500 ft, 6500 ft, FL125, FL105 etc.

According to the semi-circular rule, Flights with Magnetic tracks between 000°M and 179°M should utilise odd numbered cruising levels. We don't need to fully calculate the magnetic track of this flight, as we can see it should be eastbound and only odd numbered FLs should be used.

This leaves only FL75 and FL115 as possible answer options.

Referring to the chart, we can see that on our route we expect to overly peaks with very high elevations, including several with elevations far above 7500 ft - both near and exactly on the planned route. Under normal atmospheric pressure conditions, FL75 will not provide us with any obstacle clearance for this route!

As such, the only remaining possible altitude choice is FL115 which is a correct VFR semi-circular cruise level, that provides obstacle clearance along our route.