Aprofessional who evaluates a traveler's needs and budget and recommends, arranges, and sells part or all of the trip is a

a tour manager
b travel guide
c travel agent
d sightseeing tour guide

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?