What was unknown to scientists during Wegener's time? (1 point)
• Earth's crust is made of plates that move.
• Fossils were found in many places.
• The coasts of some continents fit together.
• Mountain ranges of some continents lined up.
• Earth's crust is made of plates that move.
• Fossils were found in many places.
• The coasts of some continents fit together.
• Mountain ranges of some continents lined up.