Need asap which of the following words requires dropping the ending and adding ies to make it plural? stray ability journey cowboy

Hi there ;) 

So from what i learned That That a ending ad a plural is
Journey
Explaintion: Journeys is the only way to make the noun journey plural. Confusion arises because some people mistakenly believe that all nouns ending in "y" should form a pluralending in "ies". When a noun ends with [vowel] + y, you only need to add an "s" to form the plural.

Abilities is a noun and plural, hope this helps. 

The goods the europeans wanted the most were gold, jewels, silk, perfumes, and especially spices.