When a number of identical small magnets are arranged in a line, the strength of the resultant magnet
-
A.
ia largest when they are arranged end to end -
B.
is greatest when they are arrangedparallel with like poles adjacent to each other -
C.
depends only on the number of magnets provided they arev parallel -
D.
is greater when the magnets are arranged on a wooden surface than on a metaln surface