Ratio analysis is a technique used to evaluate the financial performance of a company by analyzing the relationships between various financial variables in its financial statements. Let's break down the options:

A. Ignore price level changes: This statement is correct. Ratio analysis typically focuses on relative proportions and relationships between numbers rather than absolute values, so it often ignores changes in the general price level.

B. Does not enable SWOT analysis: This statement is incorrect. Ratio analysis can be a valuable tool in assessing a company's strengths and weaknesses, which are key components of SWOT analysis.

C. Helps in comparative analysis: This statement is correct. Ratio analysis involves comparing different financial variables over time or against competitors to assess performance and identify trends.

D. Reflects price level changes: This statement is incorrect. As mentioned earlier, ratio analysis usually focuses on relationships and proportions, not absolute values affected by price level changes.

E. Incorporate Non-monetary aspects: This statement is incorrect. Ratio analysis primarily deals with financial numbers and may not directly incorporate non-monetary aspects.

Therefore, the correct combination is A and C only (Option 2).