Which one of the following describes the relationship among the three vectors, \(\hat i + {\rm{}}\hat j + {\rm{}}\hat k,2\widehat {i} + {\rm{}}3\hat j + {\rm{}}\hat k,\ and\ 5\hat i + {\rm{}}6\hat j + {\rm{}}4\hat k\)?

• A. The vectors are mutually perpendicular
• B. The vectors are linearly dependent
• C. The vectors are linearly independent
• D. The vectors are unit vectors