In response to my recent post on concentrated soaps , Sue writes : Bob & I had a discussion after your last post on this topic . We had a large bottle of concentrated soap , and a small soap bottle empty . So we filled the empty bottle to the 1/4 mark with the concentrate , and diluted it 3:1 with water .

Question with options to choose from: Why might the people have done this ?
Options are: 1). Because they do n't have much soap 2). To save money 3). Because someone told them to 4). None of the above choices .
2).