Which statement about blood types is true? a. all blood is the same. b. blood types are classified by the type of red blood cells they contain. c. blood can never be mixed safely. d. all blood types are compatible.

Most of the world's booming population growth is occurring in countries that arenot highly industrialized. the high birthrates in these countries often result inlower standards of living. which of the following would be the best solution tothis global economic problem? o a. encouraging developing countries to participate in global tradeob. creating an international seed bank to protect biodiversityoc. forming strict regulations on greenhouse gas emissionso d. establishing international agreements to prevent overfishingis it a b c d