A merchant requires the ability to configure contact information for their brick and mortar stores as a CSV file upload. The module already exists and contains an etc/adminhtml/system.xml file where the new field can be added.
How do you specify the class that will process the uploaded file?
A. <upload_model>MagentoConfigModelConfigUploadFile</upload_model>
B. <frontend_model>MagentoConfigModelConfigFrontendFile</frontend_model>
C. <backend_model>MagentoConfigModelConfigBackendFile</backend_model>
D. <source_model>MagentoConfigModelConfigSourceFile</source_model>
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Answer :- C
MagentoConfigModelConfigBackendFile
Answer :- C
Answer: C