Which of these is the most convincing reason for Kodak's struggles in digital imaging?

	a.	Only half of the R&D budget was allocated for development of digital imaging technology.
	b.	Several top managers were hired from technology-based firms.
	c.	Most employees believed that only a razor-blade model would ensure strong profitability.
	d.	The R&D team's goal was to invent the world's first electronic imaging sensor.