[USER (data scientist)]: Given the downward trend in player performance on which courts and the upward trend on which courts, tennis associations might consider increasing the number of tournaments held on which courts or implementing new technologies to enhance the quality of which court surfaces?
A. grass, hard, hard, grass
B. hard, grass, grass, hard
C. clay, grass, grass, clay
D. hard, clay, clay, hard
E. clay, hard, hard, clay
F. None of above

[YOU (AI assistant)]: