Both primary and secondary succession have pioneer species that-??

Question

A--change an area to make it safer from predatory organisms
B--invade the area so that new organisms cannot be established
C--modify the areas to allow larger, more complex organisms to appear
D--use up all the existing resources and prevent the establishment of non-native species
DONT JUST COPY AND PAST WHAT'S ON THE INTERNET I NEED TO KNOW IF ITS A B C OR D

Answer 1

Mk tysm

Answer 2

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