alexanderzeitlin alexanderzeitlin 21-10-2020 Mathematics contestada (i need this ASAP) Which of the following is an arithmetic sequence? A 1, 3, 6, 10, 15, … B −8, −11, −14, −17, −20, … C 48, 24, 12, 6, 3, … D 1, 12, 123, 1234, 12345, …