Which of the Following Findings Suggests That a Given Test

Which of the following findings suggests that a given test lacks split-half reliability?

A) Jorge achieves a score of 105 on an intelligence test; when he takes the same test one month later, he achieves a score of 130.
B) Martina grades a test and gives it a score of 100; Alexander grades the same test and gives it a score of 70.
C) Trey takes a test that has 30 questions that focus on verbal tasks but only 10 questions that focus on performance tasks.
D) Darlene scores 120 on the first 20 questions of a test but scores only 80 on the second 20 questions.