[SC. ] sentence fragment vs absolute phrase

[xlxl (Well...)]

想請教以下這題(我的mac貼上來後格式怎麼改都好怪,請大家點連結看題目好了)
http://forum.chasedream.com/thread-387950-1-1.html
og17 720

According to a recent study of consumer spending on prescription medications,
 increases in the sales of the 50 drugs that were
dvertised most heavily accounts for almost half of the $20.8 billion increase in
 drug spending last year, the remainder of which  prescription medicines that
companies did not advertise or advertised very little.

A. heavily accounts for almost half of the $20.8 billion increase in drug spending last year, the remainder of which came
B. heavily were what accounted for almost half of the $20.8 billion increase in drug spending last year; the remainder of the increase coming
C. heavily accounted for almost half of the $20.8 billion increase in drug spending last year, the remainder of the increase coming
D. heavily, accounting for almost half of the $20.8 billion increase in drug spending last year, while the remainder of the increase came
E. heavily, which accounted for almost half of the $20.8 billion increase in drug spending last year, with the remainder of it coming

答案是C
但我一開始就因為覺得C是sentence fragment而把它刪掉了
查看到有網友說這是absolute phrase
但還是有點看不懂，不知道有沒有人可以說明一下怎麼判斷到底是sentence fragment
還是absolute phrase(實在看不太懂absolute phrase的定義)

--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 114.137.196.37
※ 文章網址: https://www.ptt.cc/bbs/GMAT/M.1486978682.A.0D8.html
※ 編輯: xlxl (114.137.196.37), 02/13/2017 17:39:59
推 danyuchn: 要從語意來判斷。absolute phrase中文通常叫做「獨立主
→ danyuchn: 格的分詞構句」。所以必須要具備補充說明前句細節或者
→ danyuchn: 闡述前句伴隨結果的內容。若是沒有這樣的句意關係，
→ danyuchn: 那就變成了sentence fragment。
→ danyuchn: 像這邊的the remainder of the increase coming....
→ danyuchn: 在補充說明前面提到的東西之外的東西來自哪裡，所以
→ danyuchn: 屬於補充說明細節的分詞構句。記得，absolute phrase的
→ danyuchn: 結構是S + Ving/Vpp....。不能單獨存在，是作為修飾語
→ danyuchn: 修飾緊接的主要子句。
→ xlxl: 謝謝Dustin  的說明，這樣就比較清楚了～～～