Which of the following is true?

IRR is the only measure that investors focus on when analysing the returns of a deal.

IRR is only impacted by the timing of cash flows, and so is not a good measure of profitability.

It is always true that the higher the risk of an investment, the higher the IRR that investment will achieve.

IRR is one of a collection of measures that investors focus on$,$ including profit and equity multiple $($and other factors depending on the asset class$).$