Which sentence uses correct subject-verb agreement?
a.
each of these markers are dried out.
b.
she and her friends was enjoying the hike.
c.
how many balloons should we buy for tomorrow's party?
d.
neither he nor his friends studies every day of the week.

Atahualpaemperor of the inca empire who rose to the throne after winning a civil war between him and his brother.  -he refused to become a spanish vassal or christian.-francisco pizarro kidnapped him and demanded a huge ransom.  -pizarro's secretary described him as "a man of thirty years, good-looking and poised, somewhat stout, with a wide, handsome, and ferocious face, and the eyes flaming with blood."-after the ransom was paid, atahualpa was killed by pizarro