Correct option is A
We use "a" before words that begin with a consonant sound, and "an" before words that begin with a vowel sound.
· The word "European" starts with the letter E, but it is pronounced /juː/ (you-ro-pean), which begins with a consonant sound (/j/ as in "yes"), not a vowel sound.
· Since the pronunciation starts with a consonant sound (Y), the correct article is "a", not "an".
