选C
动词consider与句子主语(the football player)间是动宾关系,所以采用现在分词的被动形式.主句是过去时态,A中动词不定式表达的是将来,不合题意.
这是现在分词短语作原因状语没错.分词短语在句中作原因状语时,相当于一个原因状语从句.
The football player was not nominated by the committee,because he was considered not very popular with all its members.