Why did the Abingdon tortoise became extinct after the introduction of goats on the island?

Due to Parasitism Due to predation Due to greater browsing efficiency of goats (competitive exclusion) None of these

Due to greater browsing efficiency of goats (competitive exclusion)

The Abingdon tortoise in Galapagos Islands became extinct within a decade after goats were introduced on the island, apparently due to the greater browsing efficiency of the goats.