Cho \(\overrightarrow a \left( {2; - 1;5} \right);...

Câu hỏi: Cho \(\overrightarrow a \left( {2; - 1;5} \right);\,\,\overrightarrow b  = \left( {0;3;1} \right)\). Tính \(\overrightarrow a .\overrightarrow b \).

A \( - 3\)

B \( - 4\)

C \(1\)

D \(2\)