Who will perform the duties of the president, if the president can't, is specified by the presidential line of succession.
After the president and vice-president, the next in line is the speaker of the House (answer c)
USA
Britian
Soviet union
France
China
In an effort to preserve the balance of power in congress between slave and free states the Missouri compromise allowed for three to still be an equal amount of slave holding states and free states. balance of power between the north and south <span />