Standard Ⅵ (C) , Referral Fees, is applicable to :（）

A. only cash consideration received for the recommendation of products or services.

B. only cash consideration paid for the recommendation of products or services.

C. all consideration received or paid for the recommendation of products or services.

下列对声调的表述不正确的是（）。

A、阴平、阳平为平声，上声、去声、入声为仄声。

B、平仄安排得当，声调平衡交替，声音显得错落有致。

C、古诗中平仄安排可概括为：同句中相互交替，对句中彼此相同。

D、新诗比较自由，没有固定的格律。