Which country or countries allow their citizens to vote for the president?

only Russia

This is because the UK has no president, and in Germany it is just a committee

If am correct there are answer choices right.

Costa Rican citizens can vote for president and national referendums regardless of their time living abroad since Electoral Code's reform of 2010. They can't, however, vote in local elections which includes deputies and municipal authorities.

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.