We are sorry to say that we have recently notice

【問題】
We are sorry to say that we have recently noticed a __________ in the quality of goods manufactured by your company.

【選択肢】
1.　decline
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070705_a1.html

2.　descent
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070705_a2.html

3.　deletion
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070705_a3.html

4.　delay
http://jibun.atmarkit.co.jp/scenter/ittrain/93_20070705_a4.html

問題提供：リアル・イングリッシュ・ブロードバンド株式会社
http://jibun.atmarkit.co.jp/misc/ct.php?id=TR56_RE1
No.09320070705