The passage suggests that the presence of G10 garnet in a kimberlite pipe indicates that:. (A) the pipe in which the garnet is found has a 90% chance of containing diamonds
(B) the levels of calcium and chrome in the pipe are conducive to diamond formation
(C) the pipe passed through a diamond-stability field and thus may contain diamonds
(D) any diamonds the pipe contains would not have come from the diamond-stability field
(E) the pipe's temperature was so high that it oxidized any diamonds the pipe might have contained

Correct

(C) the pipe passed through a diamond-stability field and thus may contain diamonds

Explanation:

The passage from which the question was gotten is attached below:

Diamonds are almost impossible to detect directly

Diamonds are almost impossible to detect directly because they  are so rare: very rich kimberlite  Line pipes, the routes through which  diamonds rise, may contain only  three carats of diamonds per ton  of kimberlite. Kimberlite begins as  magma in Earth's mantle (the layer  between the crust and the core).

As   the magma smashes through layers  of rock, it rips out debris, creating  a mix of liquid and solid material.  Some of the solid material it brings  up may come from a so-called  diamond-stability field, where conditions of pressure and temperature  are conducive to the formation of diamonds.

If diamonds are to survive, though, they must shoot toward  Earth's surface quickly. Otherwise,  they revert to graphite or burn.  Explorers seeking diamonds look  for specks of indicator minerals.

answer; inductive techniques;

i feel as if they would both catch on before to long because they would see them to frequent