Refer to the exhibit. A security analyst runs this KQL query in Microsoft Sentinel to find high-risk sign-ins. The query returns no results, but they know there were high-risk sign-ins. What is the most likely reason?
Risk level values are case-sensitive and stored as 'High'.
Why this answer
The query uses 'RiskLevelDuringSignIn' and 'RiskLevelAggregated' but filters on 'RiskLevelDuringSignIn'. However, in the schema, the field is named 'RiskLevelDuringSignIn' correctly. But the query uses 'where RiskLevelDuringSignIn == "high"' but the field may store values as 'High' (capitalized).
Option C is correct. Option A is wrong because the field exists. Option B is wrong because the query is valid syntax.
Option D is wrong because the time range is last 1 day.