△ABC has vertices A(−7,−13), B(12,−8), and C(−17,19). Which of the following represents the reflection of △ABC across the line y=x and its rotation of 90∘ about the origin?

A (−7, −13) → A ′(−13, −7) → A ″(7, −13);
B (12, −8) → B ′(−8, 12) → B ″(−12, −8);
C (−17, 19) → C ′(19, −17) → C ″(17, 19)

A (−7, −13) → A ′(−13, −13) → A ″(−13, 13);
B (12, −8) → B ′(−8, −8) → B ″(−8, 8);
C (−17, 19) → C ′(19, 19) → C ″(19, −19)

A (−7, −13) → A ′(−7, −7) → A ″(7, −7);
B (12, −8) → B ′(12, 12) → B ″(−12, 12);
C (17, 19) → C ′(−17, −17) → C ″(17, −17)

A (−7, −13) → A ′(−13, −7) → A ″(−7, 13);
B (12, −8) → B ′(−8, 12) → B ″(12, 8);
C (−17, 19) → C ′(19, −17) → C ″(−17, −19)

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