Tina reported a safety hazard at her workplace to OSHA. Representatives from OSHA came to her work and inspected the issue, then gave her employer a citation. The day after Tina's employer received the citation, Tina was given new jobs which were menial and difficult. Which of Tina's rights under OSHA was violated in this situation? A) Freedom from retaliation for exercising safety and health rights

B) Knowledge of hazardous workplace conditions

C) Obtaining training as provided in the OSHA standards

D) Access to hazard exposure and medical records

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?