Answer:
B) taught, pores
Explanation:
The students were TAUGHT that an accomplished scientist always PORES over the results of an experiment.
While both have to very different meanings, both have a definition of meaning something small (alley - small passage, pony - small horse, pour, or amount of money). Both are 6 letters, but when made plural, are spelling differently (alleys - just add s, ponies - drop the y, add ies). Both are Latin in origin, changing letter to French. But alley is late middle English, with pony being from the mid 17th century.
It implicitly states that Greta does not like her gift because she does not actually say it.