Approximately 20,000 meteors enter the earth’s atmosphere every day, but very few of them reach the earth’s surface on the grounds of they are consumed by frictional heat long before they reach the earth.
(A) but very few of them reach the earth’s surface on the grounds of they
(B) but very few of them reach the earth’s surface because most
(C) but very few of them reach the earth’s surface because they
(D) with very few of them reaching the earth’s surface on account of they
(E) since very few of them reach the earth’s surface because most