【单选题】
A Store the session information in Pub/Sub, and store the shopping cart information in Cloud SQL
B Store the shopping cart information in a file on Cloud Storage where the filename is the SESSION ID
C Store the session and shopping cart information in a MySQL database running on multiple Compute Engine instances
D Store the session information in Memorystore for Redis or Memorystore for Memcached, and store the shopping cart information in Firestore
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