You are developing an ecommerce application that stores customer, order, and inventory data as relational tables inside Cloud Spanner. During a recent load test, you discover that Spanner performance is not scaling linearly as expected. Which of the following is the cause?
A. The use of 64-bit numeric types for 32-bit numbers.
B. The use of the STRING data type for arbitrary-precision values.
C. The use of Version 1 UUIDs as primary keys that increase monotonically.
D. The use of LIKE instead of STARTS_WITH keyword for parameterized SQL queries.
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