A large company has developed a BI application that generates reports and dashboards using data collected from various operational metrics. The company wants to provide executives with an enhanced experience so they can use natural language to get data from the reports. The company wants the executives to be able ask questions using written and spoken interfaces.
Which combination of services can be used to build this conversational interface? (Choose three.)

A. Alexa for Business
B. Amazon Connect
C. Amazon Lex
D. Amazon Polly
E. Amazon Comprehend
F. Amazon Transcribe