In Microsoft Excel, what does conditional formatting allow users to do$?$ a$.$ Conditional formatting serves as a tool for merging and splitting cells in a selected range. b$.$ Conditional formatting provides a spell$-$checking feature for selected cells in a worksheet. c$.$ Conditional formatting allows users to apply formatting rules based on cell values, making it visually intuitive to identify trends, patterns, or outliers in the data. d$.$ Conditional formatting is used to encrypt and password$-$protect specific cells within a worksheet. e$.$ Conditional formatting enables users to create custom formulas for cell calculations.