Tyree is determining the distance of a segment whose endpoints are A(–4, –2) and B(–7, –7).

Step 1: d = StartRoot (negative 7 minus (negative 7)) squared + (negative 4 minus (negative 2)) squared EndRoot

Step 2: d = Square root (-7 + 7) squared + (- 4 + 2) squared

Step 3: d = Square root (0) squared + (- 2) squared

Step 4: d = Square root 0 + 4

Step 5: d = StartRoot 4

Therefore, d = 2.

Which best describes the accuracy of Tyree’s solution?
A. Tyree’s solution is accurate.
B. Tyree’s solution is inaccurate. In step 1, he substituted incorrectly.
C. Tyree’s solution is inaccurate. In step 2, he simplified incorrectly. Tyree’s solution is inaccurate. In step 3, he added incorrectly.