问题

. ______________that no one wants to __________ it.
A:Such challenging is the task; take to
B:So challenging is the task; take on
C:How challenging is the task; take up
D:The task is such challenging; take in
B:So challenging is the task; take on
C:How challenging is the task; take up
D:The task is such challenging; take in
正确答案是: