In an Operating Photovoltaic Cell, Electrons Move Through the External

In an operating photovoltaic cell, electrons move through the external circuit to the negatively charged p-type silicon wafer. How can the electrons move to the negatively charged silicon when they themselves are negatively charged? Don't like signs repel each other?

A) This is a technological hurdle that has greatly inhibited the advancement of photovoltaic technology.
B) An electric current is possible because the energy from the sun momentarily reverses the charge of the electrons, which are then called positrons (p-type) .
C) The p-type silicon wafer is actually positively charged.
D) The energy of the sunlight knocks the electrons into a direction that they would otherwise not go.