.not until rECEntly ______thE DEvElopmEnt oF tourist-rElAtEDACtivitiEs in thE rurAl ArEAs.
A. thEy hAD EnCourAgED&nBsp;
B. hAD thEy EnCourAgED&nBsp;
C. DiD thEy EnCourAgE
D. thEy EnCourAgED