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. 

South carolina was so angry about the election of lincoln that they seceded from the union on december 20, 1860. they attacked fort sumter later, on april 12, 1861.