What does "to speak to" in the last sentence of the second paragraph mean

A．Because they don't believe the surveys done by the marketers can lead to the truth.
B．Because they are asked by the marketers to find a direct way to read the consumers' thoughts.
C．Because they want to find out how the ads influence people's brain activity and emotional responses etc.
D．Because they expect that their experiments can basically alter the marketing strategies of products.

A．Both journal articles and conference papers are reported in a brief and informative way.
B．All the theses or dissertations and conference papers are reported in spoken languages.
C．Both the journal articles and conference papers are influenced greatly by the intended receivers.
D．The various formats of research reports may be presented in different ways.