Studying for the JLPT N2, I came across the following question in the Shinkansen Master Grammar book.
( ) 際は、こちらのテーブルをお使いいただけます。
I thought that a) and b) are good enough as an answer but according to the answer sheet, the correct one is a). I was wondering if there is a particular reason for it. My hypothesis is that お食事 is on formal style, therefore, more appropriate for a sentence using 際, but aside from that, both sound logical to me.