Question: Select all correct options about B - trees: if a B - trees has M - childrens each node wil hold ( M - 1

Select all correct options about B-trees:
if a B-trees has M-childrens each node wil hold (M-1) Keys
if a B-trees has M-childrens each node wil hold (M+1) Keys
Top-down approach in case of balanced data/keys
Worst case scenario for B-trees are O(n)

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