Water rises to a height h in a capillary tube lowered vertically into water to a depth l as shown in the figure. The lower end of the tube is now closed, the tube is the taken out of the water and opend again. The length of the eater column remaining in the tube will be
.
A. `2h` if `l ge h` and `l + h` if `l le h`
B. `h` if `l ge h` and `l + h` if `l le h`
C. `4h` if `l ge h` and `l - h` if `l le h`
D. `h//2` if `l ge h` and `l + h` if `l le h`
