b和c选项都是什么意思

问题如下：

A characteristic of Big Data is that:

选项：

A.

it involves formats with diverse structures.

B.

one of its traditional sources is business processes.

C.

real-time communication of it is uncommon due to vast content.

解释：

A is correct. Big Data is collected from many different sources and is in a variety of formats, including structured data (e.g., SQL tables), semistructured data (e.g., HTML code), and unstructured data (e.g., video messages).