Which of the following statements concerning Validol is true:

a) Validol has a moderate reflex and vascular dilative action caused by the stimulation of sensitive nerve endings

b) At sublingual administration the effect is produced in five minutes and 70 % of the preparation is released in 3 minutes

c) It is used in cases of angina pectoris, motion sickness, nausea, vomiting when seasick or airsick and headaches due to taking nitrates

d) All of the above