Network Systems, Inc., offers to sell a computer system to Office Supplies Company but mistakenly transposes some of the digits in the price so that $5,300 appears in the offer as $3,500. Office accepts the written offer. Office's acceptance is

enforceable because Network should have reviewed the offer more closely before sending it out.

not enforceable because Office should have reviewed the offer more closely before accepting it.

enforceable because Network must bear the responsibility for its mistake.

not enforceable because Office must bear the responsibility for the mistake.