Which empire had conquered all of Alexander’s former lands by 30 BCE? A. the Seleucid Empire B. the Antigonid Empire C. the Roman Empire D. the Ptolemaic Empire Please select the best answer from the choices provided A B C D

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies? a. it's a region that exhibits a weak gravitational pull, thus maintaining a safe distance from the sun. b. it's an area that doesn't experience any major weather events that could cause mass extinctions. c. it's an area that's an optimal distance from the sun for potentially supporting life. d. it's a region that's unaffected by asteroid or meteor impacts.