Which of the following is the fourth sentence of the passage?

Six statements are given below, which are jumbled in any random order. These statements will form a coherent and meaningful paragraph, when arranged in the correct sequence. Arrange the sentences in the right order and answer the questions that follow. (a) One of the largest aspects of behavioural change centres on our own habits. (b) It is also very helpful to learn more about habits, including the science behind them, to enable us to actually develop these healthy positive habits for lasting lifestyle change. (c) Behaviour has a tremendous influence on our health. (d) William James, a famous Harvard psychologist and philosopher who, in an attempt to understand this science, led some of the earliest investigations into habits and revealed that daily lives of humans and other living creatures can actually be described as “bundles of habits”. (e) If we can develop and focus on the right kind of habits, it gives us the power to turn our best intentions and knowledge about lifestyle into reality. (f) Even the most comprehensive lifestyle plan, including detailed diet and exercise instructions can still fail unless it includes a sound behaviour modification component.