The question is unclear since after the Revolutionary War is not enough information. A specific date is required but I'll use two dates (1790 and 1860), Maryland had the following statistics:
- 208,649 Whites.
- 8,043 non-white free inhabitants (may include Native Americans).
- 103,036 African Slaves (Including those born in the US).
For a total of 319. 728 inhabitants, only 8,043 were free, that is roughly less than 3% percent of the population which means that the correct answer is:
d: no slaves
Since part of the free non-whites were probably Native Americans and if we use the date 1790 as referential.
If we use the date 1860, Maryland had the following statistics:
- 515,918 Whites.
- 83,942 non-white free inhabitants (may include Native Americans).
- 87,189 African Slaves (Including those born in the US).For a total of 515,918 inhabitants, only 83,942 were free, that is roughly over 16% of the population which means that the correct answer is, for this referential:
b: about 1/3 of the population
It is obvious that even after the Revolutionary War Slavery was thriving in Maryland.