GWD-30-Q39
In additionto being China’s firstadministrators, in the sense that they developed a coherent bureaucracy fortheir empire, the first literate culture in East Asiawere the Shang
, and they were well known forcrafting ornate bronze ritual vessels. A. the first literateculture in East Asia were the Shang
,and they were well known for crafting B. the first literateculture in East Asia were the Shang
,well known as the crafters of C. the Shang,as the first literate culture in East Asia
, iswell known for its crafting D. the Shangwere the first literate culture in East Asia
and are wellknown as the crafters of E. the Shangwere the first literate culture in East Asia
and well known我的问题是：
why choose d.NOT c ?
why the verb that modified the Shang is plural form ,not singular form? | 
