The graph shows the location of Derek's, Evan's, and Frank's houses. Each unit on the graph represents 1 block.

A coordinate plane graph is shown. Dereks house is located at negative 3 comma 4. Evans house is located at negative 3 comma negative 4. Franks house is located at 5 comma negative 4.

If Frank walks from his house to Derek's house, then on to Evan's house along the path shown, how far will he have walked in blocks? Round your answer to the nearest hundredth.

A 16.00 blocks
B 11.31 blocks
C 19.31 blocks
D 64.01 blocks
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