Which of the following statements is true?1. Top-down and bottom-up design strategies are complementary.2. Top-down and bottom-up design strategies are mutually exclusive.3. A primary emphasis on a top-down approach may be more productive forsmall databases with few entities, attributes, relations, and transactions.4. A primarily bottom-up approach may be more productive for situationsin which the number, variety, and complexity of entities, relations, and transactionsis overwhelming.

Why is it uncommon for users to perform searches directly in database tables? a.)users are discouraged from interacting directly with tables because they might confuse tables with spreadsheets. b.) users are discouraged from interacting directly with tables because this may result in unintended changes to source data. c.)users do not have the technical skills required to perform searches directly in database tables. d.)users do not have the permissions required to perform searches directly in database tables.