A company is analyzing its product portfolio using a 2x2 matrix where one axis represents 'Market Share' (High/Low) and the other represents 'Market Growth Rate' (High/Low). Products in the 'High Market Share, High Growth' quadrant are labeled 'Stars,' while products in the 'Low Market Share, Low Growth' quadrant are 'Dogs.' Products in the 'High Market Share, Low Growth' quadrant are 'Cash Cows,' and those in 'Low Market Share, High Growth' are 'Question Marks.' If a 'Question Mark' product successfully increases its market share to become a dominant leader while the market growth remains high, into which category would it transition?