Compromising will not be effective in which of the following situations?

a. The parties need to make some progress on a project even if they cannot agree on every detail.

b. The parties have worked together for years and compromise seems to work most of the time.

c. The parties do not usually work closely with one another so compromise is acceptable this time.

d. The issue is important to both parties, but maintaining a positive working relationship is equally or more important.

e. a and b

f. c and d g. b and d