An airplane with an all-movable horizontal tail has the following data: w/s-1 500 n/m2, s 30 m. c1.max-1.5, с 3 m, xac-0.25. 05, x, l,w =ー2.5 deg, iwーー2.0 deg, awー0.1 /deg, cm, f = 0.05 + 0.1 2cl , a,- 0.08/deg, €-0.4 α, 1,-2.5 c, and η,-0.8. assuming that the most forward and aft permissible center of gravity (c. g.) locations are 0.20 č and 0.35 č, de- termine (a) the tail area and (b) tail setting angle.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Iwannasay c is the most accurate

Then the answer would be d then