A.Create etc/db_schema.xml file with the table node and constraint child node

B.Run the command bin/magento setup:db-schema:upgrade <table> <constraint declaration>

C.This can only be done with raw SQL in a Schema Patch file

D.Create the etc/db_constraints.xml file and specify foreign key there in the constraint node

A.The layout is invalid since block elements cannot be nested

B.Child block nodes are automatically rendered as HTML

C.By calling $block->getChildHtml('mynewblock') in the parent block's template

D.Automatically if the block class Custom implements the _toHtml method

A.By sending an AJAX request to the url: /customer/account/info/?json=1

B.By using customerData.get('customer') call, where customerData is an instance of Magento_Customer/js/customer-data

C.Magento does not expose customer information in JavaScript for security reasons

D.Customer information is available in localStorage and be retrieved by calling window.localStorage.getItem('customer')

A.This is not possible because products can belong to multiple categories

B.Create an after plugin on \Magento\UrlRewrite\Controller\Router::generateRewrite

C.Set the configuration value of catalog/seo/product_use_categories to Yes

D.Create an observer for controller_action_postdispatch_catalog_product_view

A.On the ModuleDataSetupInterface, call $setup->getSales()->addColumn().

B.Utilize the SalesSetup class' addAttribute method.

C.Ensure your UpgradeSchema class extends CoreSetup and call $this->addSalesColumns().

D.On the default EavSetup class, utilize the addColumn method.