Answer:
8 gram of Hydrogen
You have to work out the mass of each answers option so for
1. from atoms to mass you have to work with avagadros number (6.23x10^23) and then with the molar mass of the Carbon.
2. Already in grams so do not need to do anything
3. From mole to mass, just take the moles and multiply it by the molar mass
4. Do the same as 3 as they are both in moles