What will happen when the following code is executed?

The code, when executed, will produce the output 'Welcome to C!' because it likely involves a straightforward print command that outputs that exact string to the console. This demonstrates basic string handling in programming, where the function or method invoked correctly formats the string to be displayed to the user without any alterations or errors.

The other options revolve around different interpretations or assumptions about what the code could do. For instance, printing each word on a new line suggests the presence of additional formatting or iterations that split the string, which is not indicated in the context provided. Generating a syntax error implies that there is some issue with the way the code is written, but the straightforward nature of a print statement typically avoids this outcome when properly formatted. As for the output 'WelcometoC!', it suggests some merging of words without spaces, which does not translate to the provided output of the code. Thus, the clarity and simplicity of the print command effectively lead to the conclusion of 'Welcome to C!' as the correct outcome.