Read the excerpt from paragraph 3.
Stan Krugman collected the seeds and an attempt at germinating some of the seeds was made in Houston.
Somewhat surprisingly, it proved successful and the seeds started growing, but they did not survive long because
the facilities there were inadequate. A year later the remaining seeds were sent to the southern Forest Service
station in Gulfport, Mississippi (sycamore, loblolly pine, and sweetgum) and to the western station in Placerville,
California (redwood and Douglas fir) to attempt germination. Many of the seeds, and later cuttings, were successful
and grew into viable seedlings.
What is the meaning of viable as it is used in the excerpt?

A. weak
B. suitable
c. complete
D. awful