[A]: Rubber is obtained from the latex of Hevea brasiliensis.
[R]: Because secretory canals are abun- dantly found in the secondary phloem
A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false
