This is false. They were prominent in Upper Paleolithic. Although some studies have been conducted on this using some supposedly found tips, they were proven to not have been purposefully manufactured to be used for hunting or fighting, and have been done so by nature and by mistake.
Luring customers by advertising a low price on an item that the store does not intend to sell, then convincing them to buy a more expensive item is referred to as bait and switch. The correct option among all the options given in the question is option "b". It is a totally unethical approach towards business. Here the customer is being fooled to buy a costlier product.
The correct answer is which shows DNA replication is semi-conservative
Explanation:
He would provide financial assistance to an entrepreneur because business is important to the economy.