Andrew C. answered 03/25/21
10+ Year Math/Stats Tutor in Grade 9-12+, AP/IB/CLEP/ACT/SAT and More!
You may recall that the definition of a diagonal matrix is a matrix where all of the non-diagonal values are 0, while the diagonal values can be any constant, or 0. So, from your options, there is only one matrix matching that description, Option B.